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Segments (Details) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2018 USD ($) segment | Sep. 30, 2017 USD ($) | Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |
Number of strategic business units | segment |  |  | 4 |  |
Number of reportable segments | segment |  |  | 4 |  |
Revenue |  |  |  |  |
Total Revenue | $ 2,837 | $ 2,693 | $ 8,114 | $ 7,887 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | 327 | 238 | 870 | 670 |
Reconciliation To Income From Continuing Operations Before Taxes |  |  |  |  |
Unrealized derivative losses (gains) | 16 | (8) | 4 | (7) |
Unrealized foreign currency transaction losses (gains) | (7) | (21) | 42 | (54) |
Disposition/acquisition losses (gains) | 17 | 1 | (822) | 109 |
Impairment losses | 80 | 2 | 172 | 264 |
Extinguishment of debt losses (gains) | (1) | 48 | 177 | 43 |
Pretax contribution | 222 | 216 | 1,294 | 315 |
Net equity in earnings of affiliates | 6 | 24 | 31 | 33 |
Less: Income (loss) from continuing operations before taxes, attributable to noncontrolling interests | (116) | (112) | (409) | (405) |
Income (loss) from continuing operations before taxes and equity in earnings of affiliates | 332 | 304 | 1,672 | 687 |
Restructuring Costs | 0 | 0 | 3 | 0 |
Assets |  |  |  |  |
Total Assets | 32,489 |  | 32,489 |  | $ 33,112
Operating Segments [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 2,837 | 2,693 | 8,114 | 7,887 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | 327 | 238 | 870 | 670 |
Intersegment Eliminations [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | (9) | (13) | (34) | (22) |
US and Utilities [Domain] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 1,230 |  | 3,252 |  |
Assets |  |  |  |  |
Total Assets | 11,971 |  | 11,971 |  | 11,297
US and Utilities [Domain] | Operating Segments [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 1,230 | 1,086 | 3,252 | 3,179 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | 167 | 138 | 363 | 288 |
MCAC [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 462 |  | 1,276 |  |
Assets |  |  |  |  |
Total Assets | 4,477 |  | 4,477 |  | 4,087
MCAC [Member] | Operating Segments [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 462 | 397 | 1,276 | 1,120 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | 81 | 91 | 215 | 209 |
EURASIA [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 224 |  | 935 |  |
Assets |  |  |  |  |
Total Assets | 4,588 |  | 4,588 |  | 4,557
EURASIA [Member] | Operating Segments [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 224 | 380 | 935 | 1,204 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | 37 | 61 | 175 | 218 |
Corporate Other And Other Eliminations [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | (2) |  | (13) |  |
Assets |  |  |  |  |
Total Assets | 293 |  | 293 |  | 263
Corporate Other And Other Eliminations [Member] | Operating Segments [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 7 | 9 | 21 | 29 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | (86) | (119) | (264) | (334) |
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] |  |  |  |  |
Assets |  |  |  |  |
Total Assets | 111 |  | 111 |  | 2,034
South America [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 923 |  | 2,664 |  |
Assets |  |  |  |  |
Total Assets | 11,049 |  | 11,049 |  | $ 10,874
South America [Member] | Operating Segments [Member] |  |  |  |  |
Revenue |  |  |  |  |
Total Revenue | 923 | 834 | 2,664 | 2,377 |
Adjusted PTC |  |  |  |  |
Adjusted Pretax Contribution | $ 128 | $ 67 | $ 381 | $ 289 |

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